Universal RF power meter, what to buy?

[smaultre]

I need universal RF power meter compatible to calibrate HP, Wiltron, Agilent, R&S.. and other types of generators.
Able to measure continuous and pulsed power. Logging and compare between channels. From 9KHZ to 50..90GHz with good precision.
Not so expensive (as a R&S NRP three-path) with wide set of low cost sensors.